[gentoo-user] cross-compiling environment for Rapberry

[ralfconn]

Hello,

I recently got me a Raspberry Pi4b to use as a PiHole [1]. As a first
step I put user-space Gentoo (i.e. aarch64 stage3) on it and now I am
trying to set up my desktop to cross-compile binary packages for the PI,
to keep the Pi up-to-date in reasonable computing time.

I've built the cross toolchain with 'crossdev --taget
aarch64-unknown-linux-gnu' per wiki [2]. I've selected a 23.0-split-usr
profile on the Pi since this is the one supported by the crossdev (or so
I understood from the error message when I tried with the non-split-usr
profile on the desktop).

The crossdev environment on the desktop knows nothing about the packages
installed on the Pi, so I copied /var/db/pkg from Pi to
/usr/aarch64-unknown-linux-gnu/var/db/pkg on the desktop. I ran emerge
--sync on the Pi and on the desktop approximatively at the same time.

==== Now If I try a @system update on the Pi I get: ====

pihole ~ # emerge -uDvN --ask @system

These are the packages that would be merged, in order:

Calculating dependencies... done!
Dependency resolution took 31.91 s (backtrack: 0/20).

[ebuild     U  ] sys-libs/ncurses-6.4_p20240414:0/6::gentoo
[6.4_p20230401:0/6::gentoo] USE="cxx (split-usr*) (tinfo) -ada -debug
-doc -gpm -minimal -profile (-stack-realign) -static-libs -test -trace
-verify-sig" 7647 KiB
[ebuild     U  ] sys-apps/baselayout-2.15::gentoo [2.14-r2::gentoo]
USE="(split-usr*) -build" 30 KiB
[ebuild     U  ] dev-util/re2c-3.1::gentoo [2.2::gentoo] USE="-debug
-test" 1415 KiB
[ebuild     U  ] dev-util/pkgconf-2.2.0:0/5::gentoo [2.1.1:0/4::gentoo]
USE="(native-symlinks) -test" 305 KiB
[ebuild     U  ] app-portage/elt-patches-20240415::gentoo
[20240315::gentoo] 46 KiB
[ebuild   R    ] app-alternatives/awk-4::gentoo  USE="gawk (split-usr*)
-busybox -mawk -nawk" 0 KiB
[ebuild   R    ] app-alternatives/bzip2-1::gentoo USE="reference
(split-usr*) -lbzip2 -pbzip2" 0 KiB
[ebuild   R    ] app-alternatives/tar-0::gentoo  USE="gnu (split-usr*)
-libarchive" 0 KiB
[ebuild   R    ] app-alternatives/gzip-1::gentoo  USE="reference
(split-usr*) -pigz" 0 KiB
[ebuild     U  ] dev-libs/libxml2-2.12.6:2::gentoo [2.12.5:2::gentoo]
USE="ftp python readline -debug -examples -icu -lzma -static-libs -test"
PYTHON_TARGETS="python3_11 -python3_10 -python3_12" 2582 KiB
[ebuild     U  ] sys-devel/gettext-0.22.5::gentoo [0.22.4::gentoo]
USE="acl cxx ncurses nls openmp* (xattr) -doc -emacs -git -java
-static-libs -verify-sig" 10031 KiB
[ebuild  N     ] app-arch/libarchive-3.7.4:0/13::gentoo USE="acl bzip2
e2fsprogs iconv lzma xattr zstd -blake2 -expat -lz4 -lzo -nettle
-static-libs -test -verify-sig" 5291 KiB
[ebuild     U  ] sys-apps/shadow-4.14.6:0/4::gentoo [4.14.2:0/4::gentoo]
USE="acl nls pam (split-usr*) xattr -audit -cracklib (-selinux) -skey
-su -systemd -verify-sig" 1764 KiB
[ebuild  N     ] app-crypt/rhash-1.4.4-r1:0/1::gentoo  USE="nls ssl
-debug -static-libs" 426 KiB
[ebuild     U  ] dev-python/platformdirs-4.2.1::gentoo [4.2.0::gentoo]
USE="-test" PYTHON_TARGETS="python3_11 -pypy3 -python3_10 -python3_12"
20 KiB
[ebuild  N     ] dev-python/backports-tarfile-1.1.1::gentoo USE="-test"
PYTHON_TARGETS="python3_11 -pypy3 -python3_10" 83 KiB
[ebuild     U  ] dev-python/trove-classifiers-2024.4.10::gentoo
[2024.3.25::gentoo] USE="-test" PYTHON_TARGETS="python3_11 -pypy3
-python3_10 -python3_12" 16 KiB
[ebuild     U  ] dev-python/jaraco-context-5.3.0::gentoo [5.1.0::gentoo]
USE="-test" PYTHON_TARGETS="python3_11 -pypy3 -python3_10 -python3_12"
14 KiB
[ebuild     U  ] dev-python/jaraco-functools-4.0.1::gentoo
[4.0.0::gentoo] USE="-test" PYTHON_TARGETS="python3_11 -pypy3
-python3_10 -python3_12" 18 KiB
[ebuild     U  ] sys-apps/coreutils-9.5::gentoo [9.4-r1::gentoo]
USE="acl nls openssl (split-usr*) xattr -caps -gmp -hostname -kill
-multicall (-selinux) -static -test -vanilla -verify-sig" 5873 KiB
[ebuild  NS    ] dev-build/autoconf-2.72-r1:2.72::gentoo
[2.71-r6:2.71::gentoo] USE="-emacs -verify-sig%" 1358 KiB
[ebuild     U  ] app-eselect/eselect-pinentry-0.7.4::gentoo
[0.7.3::gentoo] 0 KiB
[ebuild     U  ] dev-perl/XS-Parse-Keyword-0.410.0::gentoo
[0.380.0::gentoo] USE="-test" 87 KiB
[ebuild     U  ] sys-apps/kmod-32-r1::gentoo [31::gentoo] USE="lzma
(split-usr%*) (tools) zlib zstd -debug -doc -pkcs7 -static-libs
(-python%)" PYTHON_TARGETS="(-python3_10%) (-python3_11%*)" 500 KiB
[ebuild     U  ] app-crypt/pinentry-1.3.0-r2::gentoo [1.2.1-r4::gentoo]
USE="ncurses -X -caps -efl -emacs -gtk -keyring -qt5 (-qt6) -verify-sig
-wayland" 597 KiB
[ebuild     U  ] dev-lang/tcl-8.6.14:0/8.6::gentoo
[8.6.13-r1:0/8.6::gentoo] USE="threads -debug" 6916 KiB
[ebuild  N     ] dev-libs/libuv-1.48.0:0/1::gentoo USE="-verify-sig"
1285 KiB
[ebuild     U  ] dev-perl/Syntax-Keyword-Try-0.290.0::gentoo
[0.280.0::gentoo] USE="-test" 45 KiB
[ebuild     U  ] app-text/po4a-0.71::gentoo [0.69::gentoo] USE="-test"
4747 KiB
[ebuild     U  ] app-portage/portage-utils-0.97::gentoo [0.96.1::gentoo]
USE="openmp* qmanifest -static (-qtegrity%*)" 1818 KiB
[ebuild     U  ] dev-python/setuptools-69.5.1-r1::gentoo
[69.2.0-r1::gentoo] USE="-test" PYTHON_TARGETS="python3_11 -pypy3
-python3_10 -python3_12" 2238 KiB
[ebuild     U  ] dev-build/meson-1.4.0-r1::gentoo [1.3.2::gentoo]
USE="(-test) -verify-sig" PYTHON_TARGETS="python3_11 -pypy3 -python3_10
-python3_12" 2504 KiB
[ebuild     U  ] dev-python/cython-3.0.10::gentoo [3.0.9::gentoo]
USE="-debug -doc -test" PYTHON_TARGETS="python3_11 -pypy3 -python3_10
-python3_12" 2707 KiB
[ebuild     U  ] dev-python/pluggy-1.5.0::gentoo [1.4.0::gentoo]
USE="-test" PYTHON_TARGETS="python3_11 -pypy3 -python3_10 -python3_12"
67 KiB
[ebuild     U  ] dev-python/lxml-5.2.1::gentoo [5.1.1::gentoo]
USE="threads -debug -doc -examples -test" PYTHON_TARGETS="python3_11
-pypy3 -python3_10 -python3_12" 929 KiB
[ebuild     U  ] dev-python/hatchling-1.24.2::gentoo [1.22.5-r1::gentoo]
USE="-test" PYTHON_TARGETS="python3_11 -pypy3 -python3_10 -python3_12"
1030 KiB
[ebuild     U  ] dev-build/ninja-1.12.0::gentoo [1.11.1-r5::gentoo]
USE="-doc (-test%)" 235 KiB
[ebuild  N     ] dev-libs/jsoncpp-1.9.5:0/25::gentoo  USE="-doc -test"
211 KiB
[ebuild  N     ] dev-build/cmake-3.29.2::gentoo  USE="ncurses (-dap)
-doc -gui -qt6 -test -verify-sig" 11492 KiB
[ebuild     U  ] sys-apps/systemd-utils-254.11::gentoo
[254.10-r1::gentoo] USE="acl kmod (split-usr*) tmpfiles udev -boot
-kernel-install -secureboot (-selinux) -sysusers -test -ukify"
PYTHON_SINGLE_TARGET="python3_11 -python3_10 -python3_12" 14102 KiB

Total: 40 packages (29 upgrades, 6 new, 1 in new slot, 4 reinstalls),
Size of downloads: 88412 KiB

==== While on the desktop I get: ====

desktop /usr/aarch64-unknown-linux-gnu #
emerge-aarch64-unknown-linux-gnu --ask -uDvN --oneshot --buildpkg @system

These are the packages that would be merged, in order:

Calculating dependencies... done!
Dependency resolution took 7.15 s (backtrack: 0/20).

[ebuild     U  ] sys-libs/ncurses-6.4_p20240414:0/6::gentoo
[6.4_p20230401:0/6::gentoo] to /usr/aarch64-unknown-linux-gnu/ USE="cxx
(split-usr*) (tinfo) -ada -debug -doc -gpm -minimal -profile
(-stack-realign) -static-libs -test -trace -verify-sig" 0 KiB
[ebuild     U  ] sys-apps/baselayout-2.15::gentoo [2.14-r2::gentoo] to
/usr/aarch64-unknown-linux-gnu/ USE="(split-usr*) -build" 0 KiB
[ebuild   R    ] app-alternatives/awk-4::gentoo to
/usr/aarch64-unknown-linux-gnu/ USE="gawk (split-usr*) -busybox -mawk
-nawk" 0 KiB
[ebuild   R    ] app-alternatives/bzip2-1::gentoo to
/usr/aarch64-unknown-linux-gnu/ USE="reference (split-usr*) -lbzip2
-pbzip2" 0 KiB
[ebuild   R    ] app-alternatives/gzip-1::gentoo to
/usr/aarch64-unknown-linux-gnu/ USE="reference (split-usr*) -pigz" 0 KiB
[ebuild   R    ] app-alternatives/tar-0::gentoo to
/usr/aarch64-unknown-linux-gnu/ USE="gnu (split-usr*) -libarchive" 0 KiB
[ebuild     U  ] sys-apps/coreutils-9.5::gentoo [9.4-r1::gentoo] to
/usr/aarch64-unknown-linux-gnu/ USE="acl nls openssl (split-usr*) xattr
-caps -gmp -hostname -kill -multicall (-selinux) -static -test -vanilla
-verify-sig" 0 KiB
[ebuild     U  ] sys-apps/kmod-32-r1::gentoo [31::gentoo] to
/usr/aarch64-unknown-linux-gnu/ USE="lzma (split-usr%*) (tools) zlib
zstd -debug -doc -pkcs7 -static-libs (-python%)"
PYTHON_TARGETS="(-python3_10%) (-python3_11%*)" 0 KiB
[ebuild     U  ] app-crypt/pinentry-1.3.0-r2::gentoo [1.2.1-r4::gentoo]
to /usr/aarch64-unknown-linux-gnu/ USE="ncurses -X -caps -efl -emacs
-gtk -keyring -qt5 (-qt6) -verify-sig -wayland" 0 KiB
[ebuild     U  ] sys-apps/shadow-4.14.6:0/4::gentoo [4.14.2:0/4::gentoo]
to /usr/aarch64-unknown-linux-gnu/ USE="acl nls pam (split-usr*) xattr
-audit -cracklib (-selinux) -skey -su -systemd -verify-sig" 0 KiB
[ebuild     U  ] sys-apps/systemd-utils-254.11::gentoo
[254.10-r1::gentoo] to /usr/aarch64-unknown-linux-gnu/ USE="acl kmod
(split-usr*) tmpfiles udev -boot -kernel-install -secureboot (-selinux)
-sysusers -test -ukify" PYTHON_SINGLE_TARGET="python3_11 -python3_10
-python3_12" 0 KiB

Total: 11 packages (7 upgrades, 4 reinstalls), Size of downloads: 0 KiB

==== What am I missing to make the desktop use the same list of packages
to be upgraded as the Pi? ====

thanks,

raffaele

[1] https://pi-hole.net/
[2] https://wiki.gentoo.org/wiki/Crossdev

[Frank Steinmetzger]

Post by ralfconn
Hello,
I recently got me a Raspberry Pi4b to use as a PiHole [1]. As a first step I
put user-space Gentoo (i.e. aarch64 stage3) on it and now I am trying to set
up my desktop to cross-compile binary packages for the PI, to keep the Pi
up-to-date in reasonable computing time.
[...]
/usr/aarch64-unknown-linux-gnu/var/db/pkg on the desktop. I ran emerge
--sync on the Pi and on the desktop approximatively at the same time.

You could simply rsync the portage tree from one host to the other to get an
identical state on both.

Post by ralfconn
[different emerge -u on both hosts]
==== What am I missing to make the desktop use the same list of packages to
be upgraded as the Pi? ====

Do you have the same use flags? I’ve never really dealt with crosscompiling.
Maybe somewhere deep in the system the use flags are changed. Try comparing
the output of emerge --info from both hosts.

[Michael]

Post by ralfconn
Hello,
I recently got me a Raspberry Pi4b to use as a PiHole [1]. As a first
step I put user-space Gentoo (i.e. aarch64 stage3) on it and now I am
trying to set up my desktop to cross-compile binary packages for the PI,
to keep the Pi up-to-date in reasonable computing time.

TBH I've had limited success with cross-compiling and this was for an x86
guest on amd64 buildhost, but I have not tried aarch64 (yet).

Post by ralfconn
I've built the cross toolchain with 'crossdev --taget
aarch64-unknown-linux-gnu' per wiki [2]. I've selected a 23.0-split-usr
profile on the Pi since this is the one supported by the crossdev (or so
I understood from the error message when I tried with the non-split-usr
profile on the desktop).

Did you download the correct stage3? There are split-usr and merged-usr tar
archives. Since split-usr is or will be soon deprecated you better start with
merged-usr.

Post by ralfconn
The crossdev environment on the desktop knows nothing about the packages
installed on the Pi, so I copied /var/db/pkg from Pi to
/usr/aarch64-unknown-linux-gnu/var/db/pkg on the desktop. I ran emerge
--sync on the Pi and on the desktop approximatively at the same time.

Why didn't you try '--usepkg y', or '--usepkgonly y' to emerge the precompiled
binaries on the pi?

Post by ralfconn
Calculating dependencies... done!
Dependency resolution took 31.91 s (backtrack: 0/20).
[ebuild U ] sys-libs/ncurses-6.4_p20240414:0/6::gentoo
[6.4_p20230401:0/6::gentoo] USE="cxx (split-usr*) (tinfo) -ada -debug
-doc -gpm -minimal -profile (-stack-realign) -static-libs -test -trace
-verify-sig" 7647 KiB
[ebuild U ] sys-apps/baselayout-2.15::gentoo [2.14-r2::gentoo]
USE="(split-usr*) -build" 30 KiB
[ebuild U ] dev-util/re2c-3.1::gentoo [2.2::gentoo] USE="-debug
-test" 1415 KiB
[ebuild U ] dev-util/pkgconf-2.2.0:0/5::gentoo [2.1.1:0/4::gentoo]
USE="(native-symlinks) -test" 305 KiB
[ebuild U ] app-portage/elt-patches-20240415::gentoo
[20240315::gentoo] 46 KiB
[ebuild R ] app-alternatives/awk-4::gentoo USE="gawk (split-usr*)
-busybox -mawk -nawk" 0 KiB
[ebuild R ] app-alternatives/bzip2-1::gentoo USE="reference
(split-usr*) -lbzip2 -pbzip2" 0 KiB
[ebuild R ] app-alternatives/tar-0::gentoo USE="gnu (split-usr*)
-libarchive" 0 KiB
[ebuild R ] app-alternatives/gzip-1::gentoo USE="reference
(split-usr*) -pigz" 0 KiB
[ebuild U ] dev-libs/libxml2-2.12.6:2::gentoo [2.12.5:2::gentoo]
USE="ftp python readline -debug -examples -icu -lzma -static-libs -test"
PYTHON_TARGETS="python3_11 -python3_10 -python3_12" 2582 KiB
[ebuild U ] sys-devel/gettext-0.22.5::gentoo [0.22.4::gentoo]
USE="acl cxx ncurses nls openmp* (xattr) -doc -emacs -git -java
-static-libs -verify-sig" 10031 KiB
[ebuild N ] app-arch/libarchive-3.7.4:0/13::gentoo USE="acl bzip2
e2fsprogs iconv lzma xattr zstd -blake2 -expat -lz4 -lzo -nettle
-static-libs -test -verify-sig" 5291 KiB
[ebuild U ] sys-apps/shadow-4.14.6:0/4::gentoo [4.14.2:0/4::gentoo]
USE="acl nls pam (split-usr*) xattr -audit -cracklib (-selinux) -skey
-su -systemd -verify-sig" 1764 KiB
[ebuild N ] app-crypt/rhash-1.4.4-r1:0/1::gentoo USE="nls ssl
-debug -static-libs" 426 KiB
[ebuild U ] dev-python/platformdirs-4.2.1::gentoo [4.2.0::gentoo]
USE="-test" PYTHON_TARGETS="python3_11 -pypy3 -python3_10 -python3_12"
20 KiB
[ebuild N ] dev-python/backports-tarfile-1.1.1::gentoo USE="-test"
PYTHON_TARGETS="python3_11 -pypy3 -python3_10" 83 KiB
[ebuild U ] dev-python/trove-classifiers-2024.4.10::gentoo
[2024.3.25::gentoo] USE="-test" PYTHON_TARGETS="python3_11 -pypy3
-python3_10 -python3_12" 16 KiB
[ebuild U ] dev-python/jaraco-context-5.3.0::gentoo [5.1.0::gentoo]
USE="-test" PYTHON_TARGETS="python3_11 -pypy3 -python3_10 -python3_12"
14 KiB
[ebuild U ] dev-python/jaraco-functools-4.0.1::gentoo
[4.0.0::gentoo] USE="-test" PYTHON_TARGETS="python3_11 -pypy3
-python3_10 -python3_12" 18 KiB
[ebuild U ] sys-apps/coreutils-9.5::gentoo [9.4-r1::gentoo]
USE="acl nls openssl (split-usr*) xattr -caps -gmp -hostname -kill
-multicall (-selinux) -static -test -vanilla -verify-sig" 5873 KiB
[ebuild NS ] dev-build/autoconf-2.72-r1:2.72::gentoo
[2.71-r6:2.71::gentoo] USE="-emacs -verify-sig%" 1358 KiB
[ebuild U ] app-eselect/eselect-pinentry-0.7.4::gentoo
[0.7.3::gentoo] 0 KiB
[ebuild U ] dev-perl/XS-Parse-Keyword-0.410.0::gentoo
[0.380.0::gentoo] USE="-test" 87 KiB
[ebuild U ] sys-apps/kmod-32-r1::gentoo [31::gentoo] USE="lzma
(split-usr%*) (tools) zlib zstd -debug -doc -pkcs7 -static-libs
(-python%)" PYTHON_TARGETS="(-python3_10%) (-python3_11%*)" 500 KiB
[ebuild U ] app-crypt/pinentry-1.3.0-r2::gentoo [1.2.1-r4::gentoo]
USE="ncurses -X -caps -efl -emacs -gtk -keyring -qt5 (-qt6) -verify-sig
-wayland" 597 KiB
[ebuild U ] dev-lang/tcl-8.6.14:0/8.6::gentoo
[8.6.13-r1:0/8.6::gentoo] USE="threads -debug" 6916 KiB
[ebuild N ] dev-libs/libuv-1.48.0:0/1::gentoo USE="-verify-sig"
1285 KiB
[ebuild U ] dev-perl/Syntax-Keyword-Try-0.290.0::gentoo
[0.280.0::gentoo] USE="-test" 45 KiB
[ebuild U ] app-text/po4a-0.71::gentoo [0.69::gentoo] USE="-test"
4747 KiB
[ebuild U ] app-portage/portage-utils-0.97::gentoo [0.96.1::gentoo]
USE="openmp* qmanifest -static (-qtegrity%*)" 1818 KiB
[ebuild U ] dev-python/setuptools-69.5.1-r1::gentoo
[69.2.0-r1::gentoo] USE="-test" PYTHON_TARGETS="python3_11 -pypy3
-python3_10 -python3_12" 2238 KiB
[ebuild U ] dev-build/meson-1.4.0-r1::gentoo [1.3.2::gentoo]
USE="(-test) -verify-sig" PYTHON_TARGETS="python3_11 -pypy3 -python3_10
-python3_12" 2504 KiB
[ebuild U ] dev-python/cython-3.0.10::gentoo [3.0.9::gentoo]
USE="-debug -doc -test" PYTHON_TARGETS="python3_11 -pypy3 -python3_10
-python3_12" 2707 KiB
[ebuild U ] dev-python/pluggy-1.5.0::gentoo [1.4.0::gentoo]
USE="-test" PYTHON_TARGETS="python3_11 -pypy3 -python3_10 -python3_12"
67 KiB
[ebuild U ] dev-python/lxml-5.2.1::gentoo [5.1.1::gentoo]
USE="threads -debug -doc -examples -test" PYTHON_TARGETS="python3_11
-pypy3 -python3_10 -python3_12" 929 KiB
[ebuild U ] dev-python/hatchling-1.24.2::gentoo [1.22.5-r1::gentoo]
USE="-test" PYTHON_TARGETS="python3_11 -pypy3 -python3_10 -python3_12"
1030 KiB
[ebuild U ] dev-build/ninja-1.12.0::gentoo [1.11.1-r5::gentoo]
USE="-doc (-test%)" 235 KiB
[ebuild N ] dev-libs/jsoncpp-1.9.5:0/25::gentoo USE="-doc -test"
211 KiB
[ebuild N ] dev-build/cmake-3.29.2::gentoo USE="ncurses (-dap)
-doc -gui -qt6 -test -verify-sig" 11492 KiB
[ebuild U ] sys-apps/systemd-utils-254.11::gentoo
[254.10-r1::gentoo] USE="acl kmod (split-usr*) tmpfiles udev -boot
-kernel-install -secureboot (-selinux) -sysusers -test -ukify"
PYTHON_SINGLE_TARGET="python3_11 -python3_10 -python3_12" 14102 KiB
Total: 40 packages (29 upgrades, 6 new, 1 in new slot, 4 reinstalls),
Size of downloads: 88412 KiB
==== While on the desktop I get: ====
desktop /usr/aarch64-unknown-linux-gnu #
Calculating dependencies... done!
Dependency resolution took 7.15 s (backtrack: 0/20).
[ebuild U ] sys-libs/ncurses-6.4_p20240414:0/6::gentoo
[6.4_p20230401:0/6::gentoo] to /usr/aarch64-unknown-linux-gnu/ USE="cxx
(split-usr*) (tinfo) -ada -debug -doc -gpm -minimal -profile
(-stack-realign) -static-libs -test -trace -verify-sig" 0 KiB
[ebuild U ] sys-apps/baselayout-2.15::gentoo [2.14-r2::gentoo] to
/usr/aarch64-unknown-linux-gnu/ USE="(split-usr*) -build" 0 KiB
[ebuild R ] app-alternatives/awk-4::gentoo to
/usr/aarch64-unknown-linux-gnu/ USE="gawk (split-usr*) -busybox -mawk
-nawk" 0 KiB
[ebuild R ] app-alternatives/bzip2-1::gentoo to
/usr/aarch64-unknown-linux-gnu/ USE="reference (split-usr*) -lbzip2
-pbzip2" 0 KiB
[ebuild R ] app-alternatives/gzip-1::gentoo to
/usr/aarch64-unknown-linux-gnu/ USE="reference (split-usr*) -pigz" 0 KiB
[ebuild R ] app-alternatives/tar-0::gentoo to
/usr/aarch64-unknown-linux-gnu/ USE="gnu (split-usr*) -libarchive" 0 KiB
[ebuild U ] sys-apps/coreutils-9.5::gentoo [9.4-r1::gentoo] to
/usr/aarch64-unknown-linux-gnu/ USE="acl nls openssl (split-usr*) xattr
-caps -gmp -hostname -kill -multicall (-selinux) -static -test -vanilla
-verify-sig" 0 KiB
[ebuild U ] sys-apps/kmod-32-r1::gentoo [31::gentoo] to
/usr/aarch64-unknown-linux-gnu/ USE="lzma (split-usr%*) (tools) zlib
zstd -debug -doc -pkcs7 -static-libs (-python%)"
PYTHON_TARGETS="(-python3_10%) (-python3_11%*)" 0 KiB
[ebuild U ] app-crypt/pinentry-1.3.0-r2::gentoo [1.2.1-r4::gentoo]
to /usr/aarch64-unknown-linux-gnu/ USE="ncurses -X -caps -efl -emacs
-gtk -keyring -qt5 (-qt6) -verify-sig -wayland" 0 KiB
[ebuild U ] sys-apps/shadow-4.14.6:0/4::gentoo [4.14.2:0/4::gentoo]
to /usr/aarch64-unknown-linux-gnu/ USE="acl nls pam (split-usr*) xattr
-audit -cracklib (-selinux) -skey -su -systemd -verify-sig" 0 KiB
[ebuild U ] sys-apps/systemd-utils-254.11::gentoo
[254.10-r1::gentoo] to /usr/aarch64-unknown-linux-gnu/ USE="acl kmod
(split-usr*) tmpfiles udev -boot -kernel-install -secureboot (-selinux)
-sysusers -test -ukify" PYTHON_SINGLE_TARGET="python3_11 -python3_10
-python3_12" 0 KiB
Total: 11 packages (7 upgrades, 4 reinstalls), Size of downloads: 0 KiB
==== What am I missing to make the desktop use the same list of packages
to be upgraded as the Pi? ====
thanks,
raffaele
[1] https://pi-hole.net/
[2] https://wiki.gentoo.org/wiki/Crossdev

Check the selected make.profile and the stage3 fs are the same on both
buildhost and guest. Also diff the two /var/lib/portage/world and don't
forget to compare/grep for different USE flags between the two systems.

Finally, if nothing works as intended consider compiling in QEMU:

https://wiki.gentoo.org/wiki/Embedded_Handbook/General/
Compiling_with_QEMU_user_chroot

[ralfconn]

Post by ralfconn
I've built the cross toolchain with 'crossdev --taget

Post by ralfconn
aarch64-unknown-linux-gnu' per wiki [2]. I've selected a 23.0-split-usr
profile on the Pi since this is the one supported by the crossdev (or so
I understood from the error message when I tried with the non-split-usr
profile on the desktop).

Did you download the correct stage3? There are split-usr and merged-usr tar
archives. Since split-usr is or will be soon deprecated you better start with
merged-usr.

I wasn't clear: when I tried to select the merged-usr profile on the
host and on the target I got an error invoking
emerge-aarch64-unknown-linux-gnu on the _host_  telling me that the
profile was 'merged-usr' but the directory layout wasn't. So the problem
is in the directory layout created by crossdev on the host.The host has
a merged-usr profile, I believe the problem is in crossdev itself. I
tried to manually copy files in the crossdev environment to recreate the
merged-usr layout but then the error on the host was even worse (I
forgot what it was) so I went back to split.

Post by ralfconn

Post by ralfconn
The crossdev environment on the desktop knows nothing about the packages
installed on the Pi, so I copied /var/db/pkg from Pi to
/usr/aarch64-unknown-linux-gnu/var/db/pkg on the desktop. I ran emerge
--sync on the Pi and on the desktop approximatively at the same time.

Why didn't you try '--usepkg y', or '--usepkgonly y' to emerge the precompiled
binaries on the pi?

That is the intention, after I'll manage to set up a workflow to
crossbuild binary packages on the host :-)

Post by ralfconn

Post by ralfconn
==== What am I missing to make the desktop use the same list of packages
to be upgraded as the Pi? ====
thanks,
raffaele
[1] https://pi-hole.net/
[2] https://wiki.gentoo.org/wiki/Crossdev

Check the selected make.profile and the stage3 fs are the same on both
buildhost and guest. Also diff the two /var/lib/portage/world and don't
forget to compare/grep for different USE flags between the two systems.

/etc/portage/make.conf on the pi and in
/usr/aarch64-unknown-linux-gnu/etc/portage/make.conf on the host are
almost identical except for host-only feature (e.g. buildpkg is only
specified on the host side) and number of emerge jobs.

Post by ralfconn
https://wiki.gentoo.org/wiki/Embedded_Handbook/General/
Compiling_with_QEMU_user_chroot

For the moment I am trying a different approach: create a list of
packages to be updated on the pi and use it as input to
the emerge-aarch64-unknown-linux-gnu command on the host.

Wow, even an emerge --sync takes forever on the pi, I was no longer used
to such long delays!

raffaele

[ralfconn]

Post by ralfconn

Post by ralfconn
I've built the cross toolchain with 'crossdev --taget

Post by ralfconn
aarch64-unknown-linux-gnu' per wiki [2]. I've selected a 23.0-split-usr
profile on the Pi since this is the one supported by the crossdev (or so
I understood from the error message when I tried with the non-split-usr
profile on the desktop).

Did you download the correct stage3?  There are split-usr and
merged-usr tar
archives.  Since split-usr is or will be soon deprecated you better
start with
merged-usr.

I wasn't clear: when I tried to select the merged-usr profile on the
host and on the target I got an error invoking
emerge-aarch64-unknown-linux-gnu on the _host_  telling me that the
profile was 'merged-usr' but the directory layout wasn't. So the
problem is in the directory layout created by crossdev on the host.The
host has a merged-usr profile, I believe the problem is in crossdev
itself. I tried to manually copy files in the crossdev environment to
recreate the merged-usr layout but then the error on the host was even
worse (I forgot what it was) so I went back to split.

Update: stage3 on the pi is merge-usr so the above is bound to fail
sooner or later (as I discovered trying to emerge
app-misc/resolve-march-native on the pi). But, the sys-apps/merge-usr
script accepts a --root parameter, so it is possible to issue, on the host:

# merge-usr --root /usr/aarch64-unknown-linux-gnu

# PORTAGE_CONFIGROOT=/usr/aarch64-unknown-linux-gnu eselect profile set
default/linux/arm64/23.0

and have on the host the same directory layout and profile of the ARM
stage3 installed on the pi.

raffaele

[Alexandru N. Barloiu]

Post by ralfconn
The crossdev environment on the desktop knows nothing about the packages
installed on the Pi, so I copied /var/db/pkg from Pi to
/usr/aarch64-unknown-linux-gnu/var/db/pkg on the desktop. I ran emerge
--sync on the Pi and on the desktop approximatively at the same time.

this is wrong. so ima gonna assume we talking about crossdev. and
cross-emerge. which should be the go to tool for this.

but here is the problem. you cant just "mimic" fake packages. which is
wht you did is.

3 different systems. host system, prolly x86/64. then virtual system.
then the actual pi. do not confuse them.

profiles are less important. dependencies are important however.

lets say you do USE="xz" ROOT="/someplace" SYSROOT=$ROOT ARCH=$whatever
cross-emerge gcc. you would need headers and libs not just in the target
system, but in the building systems as well. not just in the main
building system, the host system, but based on how and what you are
doing, you might need to build, dependencies, including in that
intermediary /usr/$arch.